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C engine

Standard bore is 3-1/4 but they do make an over bore kit that brings it out to 3-3/8 as per a catalog I have.
 
All C's came with 3 3/8" pistons with a 3 1/2" stroke. The over bore kit now is 3 7/16" for those engines. The B's and power units started with 3 1/4" pistons with the 3 1/2" stroke.
 
Odd that a catalog selling sleeve kits for the B/C etc would have what I posted in it and called the one an over bore set. By the way that is out of a nnalert catalog
 
per tractor data dot com

cut n pasted

Engine Detail:
Low-octane fuel engine designed to run on tractor fuels with an octane rating of 30 or higher.
Allis Chalmers CE
distillate
4-cylinder 8-valve
liquid-cooled vertical I-head
125.2 ci [2.1 L]
Bore/Stroke: 3.375x3.50 inches [86 x 89 mm]
Air cleaner: oil bath
Compression: 4.75:1
Rated RPM: 1500
Firing order: 1-2-4-3
Starter volts: 6
Oil capacity: 4 qts [3.8 L]
Coolant capacity: 8 qts [7.6 L]
Sparkplug: Autolite A 9
AC 47
Sparkplug gap: 0.035 inches [0.889 mm]
Point gap: 0.020 inches [0.508 mm]
Intake valve clearance: 0.010 inches [0.254 mm] (hot)
Exhaust valve clearance: 0.010 inches [0.254 mm] (hot)
Allis Chalmers C engine
 
The model C never used the 3 1/4" bore engine. It was only used on the early B.
The sleeve kit that you would buy today would be an overbore kit of 3 7/16".
Rings only are still available for the 3 1/4" and 3 3/8" pistons. LOL Bob
 
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